Very good. Thanks FeyFre.
But the voice of "Microsoft Sam" sounds a bit unnatural.
From this page you can download demo versions of other voices:
http://www.ivona.com/mini_reader.php?set_lang=us&
At the event, are available in languages: English, Polish and Romanian.

By the way, you can extend the ComboBox, because "IVONA Jennifer" does not fit.

KDJ, I am not one who provides MS SAPI voices and I do not restrict usage of this pluging to default one's.

On my PC there are installed three Microsoft's default voices(MS SAM, MS MARY and MS MIKE) + sample TTS voice bundled in MS SAPI SDK.
Also I have installed Acapela Elan TTS SpeechCube Nicolai voice(a demo) Russian texts.
For Ukrainian texts I have UkrVox TTS Engine by Yaroslav Kozak(also able to read Russian).
Also I have access to TTS-engine which was included and developed as component of larger commercial project(telephony-related) at my work(I am one of lead developers). This engine is dictionary based and have a special editor to create and edit as much voices as you want to read texts on any language you can provide dictionary.

So you see, I also shall be happy to share as much voices as I know about. But there are no much of them, especially in free access.

About ComboBox: I am not going to expand width more, because there are no much room left for large controls in bar(I personally have 15 inched monitor and max. 1024x768 resolution so sometimes I cannot see whole dockbar - it is a bit uncomfortable) and I plan add more controls.

So you have to variants:
1. Use ResHacker or source, change ComboBox width manually and rebuild plugin.
2. You can modify those labels manually. They are not hardcoded into binaries, but saved in registry:
Key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens
There are a number of subkeys one for each voice.
You can change default value of subkey for any voice without any negative consequences(this values are labels only).

KDJ
Balabolka have not any SAPI TTS-engines bundled, so it useless here.
Purpose of this plugin - to read some text directly from AkelPad without installing and starting any 3rd-party software(it is very handy for some user category). After a bit of development plugin can provide even higher level of TTS-service than Balabolka, including saving generated file into any audio format provided by system codecs.
(I know it is not so oblivious, but at least 90% of feature provided by Speech plugin, Balbolka and other software does not any additional software at all. Since SAPI provides Automation interface every WSH script can access most its features.)